+- Hack Forums (https://hackforums.net)
+-- Forum: Marketplace (https://hackforums.net/forumdisplay.php?fid=105)
+--- Forum: Auxiliary (https://hackforums.net/forumdisplay.php?fid=453)
+---- Forum: Member Sales Market (https://hackforums.net/forumdisplay.php?fid=176)
+---- Thread: %100 RUNTIME FUD .NET RAT (/showthread.php?tid=6323520)
%100 RUNTIME FUD .NET RAT - fakooo31 - Apr 8, 2026
Hey! i made this .NET remote administration tool for education and purposes only. Maybe some of you people want to buy the code.
Its fresh code. has no any user / owner out of me and made 2 days ago.
I will provide whole source code.
The price will be quite reasonable and cheap. I don't know how to sell it on this platform, but if anyone is interested, they can contact me.
Details:
# R4SoVNC — Remote Access & Control
A full-featured rat built with C# .NET 6 Windows Forms.
## Features
- Full Remote Desktop Control — Real-time screen streaming at ~30 FPS (JPEG compressed)
- Mouse & Keyboard Control — Complete mouse (move, click, scroll) and keyboard passthrough
- File Manager — Browse, upload, and download files with drag & drop support
- Client Builder — Build custom client executables with embedded host/port config
- Dark Blue Modern UI — Professional dark theme with modern Windows Forms design
- Multi-client Support — Connect to and manage multiple clients simultaneously
- TCP-based Protocol — Reliable binary packet protocol over TCP
## Architecture
```
R4SoVNC/
├── R4SoVNC.Server/ # Windows Forms server application
│ ├── Forms/
│ │ ├── MainForm # Main server UI, client list
│ │ ├── ViewerForm # Remote screen viewer + control
│ │ ├── BuilderForm # Client EXE builder
│ │ └── FileTransferForm # File manager (local ↔ remote)
│ ├── Network/
│ │ ├── R4VNCServer # TCP listener
│ │ └── ClientSession # Per-client connection handler
│ └── Protocol/
│ └── PacketProtocol # Binary packet definitions
│
└── R4SoVNC.Client/ # Console app (deployed to target machines)
├── Capture/
│ └── ScreenCapturer # Screen capture + JPEG compression
├── Input/
│ └── InputHandler # Mouse/keyboard simulation (Win32 API)
├── FileTransfer/
│ └── FileHandler # File list, upload, download
└── Network/
└── ServerConnection # TCP connection to server
```
## Requirements
- Windows 10/11 (x64)
- .NET 6.0 SDK (for building)
- .NET 6.0 Runtime (for running — or publish self-contained)
- Visual Studio 2022 recommended
## Quick Start
### 1. Open Solution
Open `r4sovnc.sln` in Visual Studio 2022.
### 2. Build & Run Server
Set `R4SoVNC.Server` as startup project and run (F5).
### 3. Configure Server
- Enter a port number (default: 7890)
- Click ▶ Start Server
### 4. Build a Client
- Click Client Builder
- Enter your server's IP/hostname and port
- Enter output filename (e.g. `r4client.exe`)
- Click Build Client
- Distribute the built EXE to the target machine
### 5. Connect
- When a client runs and connects, it appears in the Connected Clients list
- Double-click a client or select it and click Connect / View
- In the viewer, click Start Control to take control
- Click File Manager to browse and transfer files
## Packet Protocol
| Type | ID | Description |
|------|----|-------------|
| Heartbeat | 0x01 | Keep-alive |
| ScreenData | 0x02 | JPEG frame |
| MouseMove | 0x03 | x, y coordinates |
| MouseClick | 0x04 | button, x, y, down |
| MouseScroll | 0x05 | scroll delta |
| KeyDown/Up | 0x06/07 | VK code |
| FileListRequest | 0x08 | path string |
| FileListResponse | 0x09 | JSON array |
| FileUpload | 0x0A-0C | request, data, complete |
| FileDownload | 0x0D-0F | request, data, done |
| ClientInfo | 0x10 | machine name |
| Disconnect | 0x11 | graceful disconnect |
## File Transfer Usage
1. Click File Manager in the viewer toolbar
2. Left panel = your local files | Right panel = remote client files
3. Upload: Select a local file → click ⬆ Upload → (or drag from local to remote)
4. Download: Select a remote file → click ⬇ Download ← (or double-click)
5. Navigate folders by double-clicking directories
6. Use ↑ Up to go to parent directory, ↻ Refresh to reload
## Notes
- For internet connections: use your public IP or a domain name in the builder
- Screen quality can be adjusted in `ScreenCapturer` (default: 50% JPEG quality)
- The client runs silently in the background (console hidden in release builds)
## License
MIT License — free to use and modify.
[contract=tid]Start Contract[/contract]
RE: %100 RUNTIME FUD .NET RAT - MadScientist - Apr 8, 2026
(Apr 8, 2026 01:18 PM)fakooo31 Wrote: Hey! i made this .NET remote administration tool for education and purposes only. Maybe some of you people want to buy the code.
Its fresh code. has no any user / owner out of me and made 2 days ago.
I will provide whole source code.
The price will be quite reasonable and cheap. I don't know how to sell it on this platform, but if anyone is interested, they can contact me.
[contract=tid]Start Contract[/contract]
Looking to provide any vouch copies? What makes it unique compared to whats out there? You should include a detailed summary of features and a demo video if you want to get any interest mate! You just joined and have 2 posts with no upgraded account so members will be very skeptical.
RE: %100 RUNTIME FUD .NET RAT - fakooo31 - Apr 8, 2026
(Apr 8, 2026 01:25 PM)MadScientist Wrote: Looking to provide any vouch copies? What makes it unique compared to whats out there? You should include a detailed summary of features and a demo video if you want to get any interest mate! You just joined and have 2 posts with no upgraded account so members will be very skeptical.
Hello actually all proofs and details even video available but i couldn't share them on here cuz i have to upgrade my account. but i can provide every detail on direct message or from telegram. is it possible?
RE: %100 RUNTIME FUD .NET RAT - MadScientist - Apr 8, 2026
(Apr 8, 2026 01:30 PM)fakooo31 Wrote: Hello actually all proofs and details even video available but i couldn't share them on here cuz i have to upgrade my account. but i can provide every detail on direct message or from telegram. is it possible?
You could include at least a detailed features list in your OP, just trying to help ya get more interest into your project :D
RE: %100 RUNTIME FUD .NET RAT - fakooo31 - Apr 8, 2026
(Apr 8, 2026 01:40 PM)MadScientist Wrote: You could include at least a detailed features list in your OP, just trying to help ya get more interest into your project :D
Alright! Thank you mate :)